Shigeaki Ohmi
Hoya Corporation
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Publication
Featured researches published by Shigeaki Ohmi.
Applied Optics | 1988
Shigeaki Ohmi; Hiroyuki Sakai; Yoshiyuki Asahara; Shin Nakayama; Yoshitaka Yoneda; Tetsuro Izumitani
Gradient-index rod lenses with a parabolic-index profile have been fabricated by a double Na-Ag ion-exchange process, and their optical characteristics have been evaluated. The numerical aperture and minimum focused spot diameter of the 2-mm diam rod lens were 0.58 and 2.5 microm for lambda = 0.63 microm, respectively. Because of the high diffusing rate for Ag ions, this technique offers the possibility of making large-sized (larger than 10 mm-diam) rod lenses for photographic uses.
Applied Optics | 1985
Yoshiyuki Asahara; Hiroyuki Sakai; Seiichi Shingaki; Shigeaki Ohmi; Shin Nakayama; Kenji Nakagawa; Tetsuro Izumitani
A gradient-index slab lens (2.5–3.4 mm thick) with parabolic-index profiles along the direction of thickness has been fabricated by a molecular stuffing process, and its refractive-index profiles have been evaluated.
Archive | 2002
Koji Sato; Shigeaki Ohmi
Archive | 1983
Shigeaki Ohmi; Seiichi Shingaki; Hiroyuki Sakai; Yoshiyuki Asahara
Archive | 2004
Thunnakart Boontarika; Shigeaki Ohmi
Archive | 1992
Yoshiyuki Asahara; Shigeaki Ohmi; Hiroyuki Sakai; Yoshitaka Yoneda
Archive | 2003
Takashi Igari; Shigeaki Ohmi
Archive | 1988
Hiroyuki Sakai; Shigeaki Ohmi; Yoshitaka Yoneda; Yoshiyuki Asahara
Archive | 1984
Shigeaki Ohmi; Seiichi Shingaki; Hiroyuki Sakai; Yoshiyuki Asahara
Archive | 1984
Yoshiyuki Asahara; Hiroshi Sakai; Seiichi Shingaki; Shigeaki Ohmi
